package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {


	public static void main(String[] args) throws IOException {
		if (args.length < 3) {
			System.out.println("Please specify parameters: <amount of test data> <file> <format>");
			return;
		}
		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]);
		String format = args[2];
		
		if (file.exists()) {
			System.out.println("File exists, please remove it manually: " + file);
			return;
		}
		
		List<ContactData> contacts = generateRandomContacts(amount);
		if ("csv".equals(format)) {
			saveContactsToCsvFile(contacts, file);	
			System.out.println("Csv file is successfully generated!");
		} else if ("xml".equals(format)) {
			saveContactssToXmlFile(contacts, file);
			System.out.println("Xml file is successfully generated!");
		} else {
			System.out.println("Unknown format" + format);
			return;
		}
	}
	
	private static void saveContactssToXmlFile(List<ContactData> contacts, File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
	}

	private static void saveContactsToCsvFile(List<ContactData> contacts, File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstname() + "," 
						+ contact.getLastname() + "," 
						+ contact.getAddress1() + "," 
						+ contact.getHomephone() + "," 
						+ contact.getMobilephone() + "," 
						+ contact.getWorkphone() + "," 
						+ contact.getEmail1() + "," 
						+ contact.getEmail2() + "," 
						+ contact.getBday() + "," 
						+ contact.getBmonth() + "," 
						+ contact.getByear() + "," 
						+ contact.getContactgroup() + "," 
						+ contact.getAddress2() + "," 
						+ contact.getPhone2() + ",!" + "\n");
			
		}
		writer.close();
	}
	
	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
			  .withFirstname(part[0])
			  .withLastname(part[1])
			  .withAddress1(part[2])
			  .withHomephone(part[3])
			  .withMobilePhone(part[4])
			  .withWorkphone(part[5])
			  .withEmail1(part[6])
			  .withEmail2(part[7])
			  .withBday(part[8])
			  .withBmonth(part[9])
			  .withByear(part[10])
			  .withContactgroup(part[11])
			  .withAddress2(part[12])
			  .withPhone2(part[13]);
			list.add(contact);
			line = bufferedReader.readLine();
		}
		bufferedReader.close();
		return list;
	}
	
	public static List<ContactData> loadContactsFromXmlFile(File file) {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);
	}
	
	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();

		for (int i = 0; i < amount; i++) {
			ContactData contact = new ContactData()
			.withFirstname(generateRandomString())
			.withLastname(generateRandomString())
			.withAddress1(generateRandomString())
			.withHomephone(generateRandomPhoneNumber())
			.withMobilePhone(generateRandomPhoneNumber())
			.withWorkphone(generateRandomPhoneNumber())
			.withEmail1(generateRandomEmail())
			.withEmail2(generateRandomEmail())
			.withBday("")
			.withBmonth("")
			.withByear(generateRandomYear(1940,1995))
			.withContactgroup("")
			.withAddress2(generateRandomString())
			.withPhone2(generateRandomPhoneNumber());
			list.add(contact);
		}
		return list;
	}
	
	public static String generateRandomString() {
		Random rnd = new Random();
		if (rnd.nextInt(5) == 0) {
			return "";
		} else {
			return "test" + rnd.nextInt();
		}

	}
	
	public static String generateRandomYear(int start, int end) {
		Random rnd = new Random();
		int interval = end - start;
		int year =  start + rnd.nextInt(interval);
		return Integer.toString(year);
	}
	
	public static String generateRandomPhoneNumber () {
		Random rnd = new Random();
		if (rnd.nextInt(5) == 0) {
			return "";
		} else {
			return "+7 (" + Integer.toString(100 + rnd.nextInt(900)) + ") " + Integer.toString(1000000 + rnd.nextInt(90000000));
		}
	}
	
	public static String generateRandomEmail () {
		Random rnd = new Random();
		if (rnd.nextInt(5) == 0) {
			return "";
		} else {
			return "test" + rnd.nextInt() + "@test.com";
		}
	}
	
}

